分布电容法在变压器绕组变形故障中辅助分析

摘要

In allusion to that a three-phase on-load voltage regulation power transformer has the possibility of winding deformation in 110kV substation of certain power supply company, this paper adopted the distributed capacitance method combined with the common frequency re-sponse method, the reactance method, the winding dielectric loss factor and the capacitance of power transformer etc to analyze whether or not this power transformer winding deformed and which winding had deformation. Via disassembling the returned transformer, it is found that there existed winding deformation in medium-voltage and low-voltage windings, which confirms that the distributed capacitance method can be used as auxiliary methods of winding deformation analysis.%针对某供电公司110kV变电站一台三相有载调压电力变压器存在绕组变形的可能性，采用分布电容法结合常用的频率响应法、电抗法、绕组介质损耗因数和电容量等多种方法分析该台电力变压器绕组是否变形，以及是何绕组出现变形。经变压器返厂解体后发现中压绕组、低压绕组确实存在绕组变形，确定了分布电容法可作为绕组变形分析的辅助方法。